DMVPN

最近似乎有DMVPN的需求，網路找的資料記錄一下~

https://www.jannet.hk/zh-Hant/post/dynamic-multipoint-virtual-private-network-dmvpn/

http://www.china-ccie.com/doc/vpn/vpn.html#37

https://ccie.lol/knowledge-base/lab-dmvpn-ipsec-multicast/